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pnmenc.c
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1 /*
2  * PNM image format
3  * Copyright (c) 2002, 2003 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/pixdesc.h"
23 #include "avcodec.h"
24 #include "internal.h"
25 
27  const AVFrame *p, int *got_packet)
28 {
29  uint8_t *bytestream, *bytestream_start, *bytestream_end;
30  int i, h, h1, c, n, linesize, ret;
31  uint8_t *ptr, *ptr1, *ptr2;
32 
33  if ((ret = ff_alloc_packet2(avctx, pkt, avpicture_get_size(avctx->pix_fmt,
34  avctx->width,
35  avctx->height) + 200)) < 0)
36  return ret;
37 
38  bytestream_start =
39  bytestream = pkt->data;
40  bytestream_end = pkt->data + pkt->size;
41 
42  h = avctx->height;
43  h1 = h;
44  switch (avctx->pix_fmt) {
46  c = '4';
47  n = (avctx->width + 7) >> 3;
48  break;
49  case AV_PIX_FMT_GRAY8:
50  c = '5';
51  n = avctx->width;
52  break;
54  c = '5';
55  n = avctx->width * 2;
56  break;
57  case AV_PIX_FMT_RGB24:
58  c = '6';
59  n = avctx->width * 3;
60  break;
61  case AV_PIX_FMT_RGB48BE:
62  c = '6';
63  n = avctx->width * 6;
64  break;
65  case AV_PIX_FMT_YUV420P:
66  if (avctx->width & 1 || avctx->height & 1) {
67  av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n");
68  return AVERROR(EINVAL);
69  }
70  c = '5';
71  n = avctx->width;
72  h1 = (h * 3) / 2;
73  break;
75  c = '5';
76  n = avctx->width * 2;
77  h1 = (h * 3) / 2;
78  break;
79  default:
80  return -1;
81  }
82  snprintf(bytestream, bytestream_end - bytestream,
83  "P%c\n%d %d\n", c, avctx->width, h1);
84  bytestream += strlen(bytestream);
85  if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) {
86  int maxdepth = (1 << (av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1)) - 1;
87  snprintf(bytestream, bytestream_end - bytestream,
88  "%d\n", maxdepth);
89  bytestream += strlen(bytestream);
90  }
91 
92  ptr = p->data[0];
93  linesize = p->linesize[0];
94  for (i = 0; i < h; i++) {
95  memcpy(bytestream, ptr, n);
96  bytestream += n;
97  ptr += linesize;
98  }
99 
100  if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
101  h >>= 1;
102  n >>= 1;
103  ptr1 = p->data[1];
104  ptr2 = p->data[2];
105  for (i = 0; i < h; i++) {
106  memcpy(bytestream, ptr1, n);
107  bytestream += n;
108  memcpy(bytestream, ptr2, n);
109  bytestream += n;
110  ptr1 += p->linesize[1];
111  ptr2 += p->linesize[2];
112  }
113  }
114  pkt->size = bytestream - bytestream_start;
115  pkt->flags |= AV_PKT_FLAG_KEY;
116  *got_packet = 1;
117 
118  return 0;
119 }
120 
122 {
123  avctx->coded_frame = av_frame_alloc();
124  if (!avctx->coded_frame)
125  return AVERROR(ENOMEM);
126 
128  avctx->coded_frame->key_frame = 1;
129 
130  return 0;
131 }
132 
134 {
135  av_frame_free(&avctx->coded_frame);
136  return 0;
137 }
138 
139 #if CONFIG_PGM_ENCODER
140 AVCodec ff_pgm_encoder = {
141  .name = "pgm",
142  .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
143  .type = AVMEDIA_TYPE_VIDEO,
144  .id = AV_CODEC_ID_PGM,
145  .init = pnm_encode_init,
146  .close = pnm_encode_close,
147  .encode2 = pnm_encode_frame,
148  .pix_fmts = (const enum AVPixelFormat[]){
150  },
151 };
152 #endif
153 
154 #if CONFIG_PGMYUV_ENCODER
155 AVCodec ff_pgmyuv_encoder = {
156  .name = "pgmyuv",
157  .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
158  .type = AVMEDIA_TYPE_VIDEO,
159  .id = AV_CODEC_ID_PGMYUV,
160  .init = pnm_encode_init,
161  .close = pnm_encode_close,
162  .encode2 = pnm_encode_frame,
163  .pix_fmts = (const enum AVPixelFormat[]){
165  },
166 };
167 #endif
168 
169 #if CONFIG_PPM_ENCODER
170 AVCodec ff_ppm_encoder = {
171  .name = "ppm",
172  .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
173  .type = AVMEDIA_TYPE_VIDEO,
174  .id = AV_CODEC_ID_PPM,
175  .init = pnm_encode_init,
176  .close = pnm_encode_close,
177  .encode2 = pnm_encode_frame,
178  .pix_fmts = (const enum AVPixelFormat[]){
180  },
181 };
182 #endif
183 
184 #if CONFIG_PBM_ENCODER
185 AVCodec ff_pbm_encoder = {
186  .name = "pbm",
187  .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
188  .type = AVMEDIA_TYPE_VIDEO,
189  .id = AV_CODEC_ID_PBM,
190  .init = pnm_encode_init,
191  .close = pnm_encode_close,
192  .encode2 = pnm_encode_frame,
193  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
194  AV_PIX_FMT_NONE },
195 };
196 #endif